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Jurassic sedimentary and volcanic rocks

Sandstone and conglomerate derived from volcanic rocks with associated intermediate-composition lava flows, breccias, and tuffs. In southern Arizona this unit includes rocks of the Artesa sequence, Pitoikam Formation, Mulberry Wash volcanics, Rudolfo Red Beds, Recreation Red Beds, and Gardner Canyon Formation. In western Arizona it includes the Harquar Formation, rocks of Slumgullion, and related(?) unnamed units in the Kofa and Middle Mountains. This unit is characterized by maroon, brown, and purplish-gray volcanic-lithic sandstone and siltstone, with subordinate to abundant conglomerate, quartz-rich sandstone and sparse limestone. (150-170 Ma)
StateArizona
NameJurassic sedimentary and volcanic rocks
Geologic ageJurassic
Original map labelJsv
Primary rock typesandstone
Secondary rock typeconglomerate
Other rock typesargillite; mudstone; siltstone; phyllite; dacite; meta-conglomerate; intermediate metavolcanic rock; meta-rhyolite; wacke; quartz-feldspar schist; rhyolite; schist; sedimentary breccia; pelitic schist; andesite; greenschist; arenite; basalt; granofels; hornfels; latite; limestone; felsic metavolcanic rock; orthoquartzite; quartzite; trachyandesite; alkaline basalt; trachybasalt
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Calcareous)
Minor
Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic)
Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Incidental
Tectonite > Melangebroken formation, locally in units with very high ductility contrast
Igneous > Hypabyssal > Felsic-hypabyssal (Dike or sill)comendite
Igneous > Volcanic > Alkalic-volcanic (Flow)comendite
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Stock or pipe)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Stock or pipe)
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-mafic-alkaline (Dike or sill)
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Dike or sill)
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basalt (Dike or sill)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Dike or sill)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-quartz-trachyte (Dike or sill)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-quartz-latite (Dike or sill)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Dike or sill)
Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic)
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Volcaniclastic)
Igneous > Volcanic > Felsic-volcanic > Quartz-trachyte (Volcaniclastic)
Igneous > Volcanic > Felsic-volcanic > Quartz-latite (Volcaniclastic)
Igneous > Volcanic > Felsic-volcanic > Dacite (Volcaniclastic)
Igneous > Volcanic > Alkalic-volcanic > Basanite (Volcaniclastic)
Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic)
Igneous > Volcanic > Felsic-volcanic > Quartz-trachyte (Pyroclastic)
Igneous > Volcanic > Felsic-volcanic > Quartz-latite (Pyroclastic)
Igneous > Volcanic > Alkalic-volcanic > Basanite (Pyroclastic)
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow)
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow)
Igneous > Volcanic > Felsic-volcanic > Quartz-trachyte (Flow)
Igneous > Volcanic > Felsic-volcanic > Quartz-latite (Flow)
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow)
Igneous > Volcanic > Alkalic-volcanic > Basanite (Flow)
Metamorphic > Schist (Greenschist)
Metamorphic > Quartzite (Greenschist)
Metamorphic > Phyllite (Greenschist)
Metamorphic > Metavolcanic (Greenschist)metarhyolite, metadacite
Metamorphic > Metasedimentary (Greenschist)including metaconglomerate, semischist
Metamorphic > Marble (Greenschist)
Metamorphic > Hornfels (Greenschist)
Metamorphic > Greenstone (Greenschist)
Metamorphic > Granofels (Greenschist)
Metamorphic > Argillite (Greenschist)
Metamorphic > Schist (Amphibolite, epidote-amphibolite)
Metamorphic > Quartzite (Amphibolite, epidote-amphibolite)
Metamorphic > Phyllite (Amphibolite, epidote-amphibolite)
Metamorphic > Metavolcanic (Amphibolite, epidote-amphibolite)metarhyolite, metadacite
Metamorphic > Metasedimentary (Amphibolite, epidote-amphibolite)including metaconglomerate, semischist
Metamorphic > Marble (Amphibolite, epidote-amphibolite)
Metamorphic > Hornfels (Amphibolite, epidote-amphibolite)
Metamorphic > Greenstone (Amphibolite, epidote-amphibolite)
Metamorphic > Granofels (Amphibolite, epidote-amphibolite)
Metamorphic > Argillite (Amphibolite, epidote-amphibolite)
Metamorphic > Schist (Amphibolite)
Metamorphic > Quartzite (Amphibolite)
Metamorphic > Phyllite (Amphibolite)
Metamorphic > Metavolcanic (Amphibolite)metarhyolite, metadacite
Metamorphic > Metasedimentary (Amphibolite)including metaconglomerate, semischist
Metamorphic > Marble (Amphibolite)
Metamorphic > Greenstone (Amphibolite)
Metamorphic > Granofels (Amphibolite)
Metamorphic > Argillite (Amphibolite)
Sedimentary > Clastic > Siltstone (Tuffaceous)
Sedimentary > Clastic > Sandstone (Tuffaceous)
Sedimentary > Clastic > Mudstone (Tuffaceous)
Sedimentary > Clastic > Siltstone (Calcareous)
Sedimentary > Clastic > Mudstone (Calcareous)
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sedimentary-breccia (Bed)
Sedimentary > Clastic > Sandstone > Graywacke (Bed)
Sedimentary > Clastic > Sandstone > Arkose (Bed)
Sedimentary > Clastic > Sandstone > Arenite > Calcarenite (Bed)
Sedimentary > Clastic > Sandstone > Arenite (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Carbonate > Marlstone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Metamorphic > Hornfels (Amphibolite)
Map references
Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Unit references
Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Tosdal R.M., Haxel, G.B., and Wright, J.E., 1989, Jurassic geology of the Sonoran Desert region, southern Arizona, southeastern California, and northernmost Sonora: Construction of a continental-margin magmatic arc, in Jenney, J.P., and Rey
Geographic coverageCochise - La Paz - Pima - Santa Cruz - Yuma

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